Self-starting injector for steam boilers



J. HALL.

SELF STARTING INJECTOR FOR STEAM BOILERS.

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APPLICATION FILED NOV- 13, 1919.

Patented July 11, 1922.

EATENT @FFEQEL JOSEPH HALL, OF STOCKPORT, ENGLAND.

Application filed November 13, 1919.

To all whom it may concern:

Be it known that I, Josnria HALL, a British subject, residing at Stockport, county of Chester, England, have invented certain new and useful Improvements in Self- Starting Injectors for Steam Boilers, of which the following is a specification.

This invention relates to improvements in injectors for steam boilers.

The object of this improvement is to construct injectors, having a self acting motion for starting and restarting (automatically), and for the purpose of lifting and forcing water into steam boilers against concussion and vibration, or break-off in the water supply.

The invention consists in the particular construction and disposition of the parts comprising a longitudinally sliding nozzle placed above an automatic lifting cone and nozzle to create a vacuum in the overflow chamber, a chamber forming a liquid pressure receiver at the outlet end of the delivery cone and a check valve with water and steam passages through it to facilitate starting and to effect a self closing when the injector is stopped. The invention will be fully described with reference to the accompanying drawing which shows a section through the injector.

The injector is provided with a steam inlet A and a water inlet B both of which are provided with control valves not shown on the drawing. The steam inlet A is connected to a nozzle or orifice a screwed into the water inlet B so as to be concentric therewith with an annular water space 6 around it. The water inlet B is screwed into the main casing C of the injector. Above the steam nozzle a and the water space. 6 is arranged an automatic lifting cone and nozzle D held in position by being screwed on to an annular ring 0 inwardly projecting from the casing C.

The lifting cone and nozzle D is tapered along the greater part of its length but its outlet (Z is enlarged.

The steam nozzle a and the lifting cone I) serve to raise water into the injector and for starting or restarting automatically in case of a break in the water supply.

A chamber E is formed around the lifting cone D and is connected to the overflow E.

The tubular body F carries in its lower Specification of Letters Patent.

sliding nozzle F.

SELF-STARTING INJECTOR FOR- STEAM BOILERS.

Patented July 11, 1922.

Serial No. 337,757.

part a longitudinally sliding nozzle F arranged vertically above the lifting cone D, and the sliding nozzle F serves the purpose of creating a partial vacuum in the overflow chamber E and for taking up the overflow water automatically. The top of the cone D serves as a seating for the bottom of the The delivery cone f through the upper part of the body F is tapered as shown, and opens into a chamber Gr which acts as a receiver for the water pressure from the delivery cone 7' thereby facilitating the automatic starting and restarting of the injector. The upper end of the member F serves as a seat for an automatic check valve H which slides in the upper end of the casing C and closes the chamber G. The check valve H is provided at or near its centre with steam and water passages h it and with a passage ]l-2 in the centre for admitting the boiler pressure in the cap of the injector casing, the boiler pressure being used for automatically forc ing down the check valve H on to its seating.

The chamber G opens into an annular chamber K surrounding the member F and connecting with the delivery L which is provided with a controlling valve not shown in the drawing.

The injector is particularly applicable for use on boilers of locomotives. although it may be used on other types of boilers.

hat I claim as my invention and desire to protect by Letters Patent is In a self-starting injector for steam boilersathe combination with a steam nozzle and lifting cone for raising water into the injector for starting and restarting automatically of a sliding cone placed above the lifting cone. to create a partial vacuum in the overflow chamber, a delivery cone, aliquid pressure chamber at the delivery orifice of the delivery cone to facilitate starting and restarting of the injector and a valve controlled by the pressure of the boiler closing said pressure chamber.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

J. OWDEN OBRIEN, Geo. H. OBRIEN. 

